
GD(w/o STI)-137
Diagnostic Trouble Code (DTC) Detecting Criteria
GENERAL DESCRIPTION
Mode A (Vacuum pump operation confirmation and characteristics stability)
Purpose: Detect the vacuum pump operation trouble.
Judge as NG when the following conditions are established.
Judge as OK if the following conditions are not established, and warm up for five minutes to stabilize the vac-
uum pump characteristics.
Mode B (Measurement of reference pressure for setting the target negative pressure)
1. Purpose: Judge the reference pressure stability.
Judge as NG when the following conditions are established.
2. Purpose: Judge whether the reference pressure is within the normal range, and detect the vacuum pump
and orifice malfunctions.
Judge as NG when the following conditions are established.
Mode C (Switching valve operation confirmation)
Purpose: Measure the pressure increase when switching valve is changed from open to close, and detect the
stuck to open/close malfunctions of the switching valve.
Judge as NG when the following conditions are established.
Judgment Value
Malfunction Criteria Threshold Value DTC
Pressure sensor output value > –224 Pa (–1.7 mmHg, –0.1 inHg) P2404
Judgment Value
Malfunction Criteria Threshold Value DTC
|Pressure sensor maximum output value – Pressure sensor mini-
mum output value|
> 493 Pa (3.7 mmHg, 0.1 inHg) P2404
Judgment Value
Malfunction Criteria Threshold Value DTC
Reference pressure for setting the target negative pressure < Value of Map 2
or
> Value of Map 3
P2404
Map 2
Atmospheric pressure
kPa (mmHg, inHg)
70 (525, 20.7) 80 (600, 23.6) 90 (675, 26.6) 100 (750, 29.5)
Reference pressure for setting the
target negative pressure
Pa (mmHg, inHg)
–3972 (–29.8, –1.2) –4079 (–30.6, –1.2) –4186 (–31.4, –1.2) –4292 (–32.2, –1.3)
Map 3
Atmospheric pressure
kPa (mmHg, inHg)
70 (525, 20.7) 80 (600, 23.6) 90 (675, 26.6) 100 (750, 29.5)
Reference pressure for setting the
target negative pressure
Pa (mmHg, inHg)
–942 (–7.1, –0.3) –1048 (–7.9, –0.3) –1155 (–8.7, –0.3) –1262 (–9.5, –0.4)
Judgment Value
Malfunction Criteria Threshold Value DTC
Pressure sensor output value – Reference pressure for setting the
target negative pressure
< 224 Pa (1.7 mmHg, 0.1 inHg) P2404
15WRX_STI_US_EN.book 137 ページ 2015年2月13日 金曜日 午前11時20分